1Made of #45 steel, the whole tool is quenched and heat treated, with high hardness and good wear resistance. 2Accurate and precise markings can be made on leather, wood, soft metals (copper, brass, aluminum and mild steel), etc. 3The font is clear, and a very clear number imprint can be placed on the surface of leather and wood. 4ABS material plastic storage box , easy to store and carry, not easy to lose. 5Whether it is DIY handcraft products or important items that need to be marked, the tool can easily leave a mark on the surface of the item.